Ash Costello

Ash has over 20 years’ experience across investment funds, digital infrastructure and technology regulation. She spent the early part of her career in private practice before moving in-house into senior leadership roles, including Global Head of Legal at MUFG Investor Services, where she led the legal function across the firm’s global fund administration and investor services business.

More about Ash

Ash currently focuses on advising fund managers, asset managers, property investors and family estates on fund and LLP structuring, joint ventures, and property investment structuring — including joint ventures between landowners and institutional investors for data centre, energy and digital infrastructure development. She also advises on the regulatory framework governing digital assets and emerging technology in financial services, including DORA, the EU AI Act, the Digital Services Act, the Digital Markets Act, NIS2 and GDPR. Qualified in Ireland and England, Ash is able to advise directly under EU digital regulation frameworks and to engage with EU regulators. This gives her clients a genuine EU practice capability that most London-based digital regulation advisers cannot offer. Ash is a member of the Expert Panel of the EU Blockchain Observatory and Forum, for whom she has co-authored reports on smart contracts and blockchain applications in financial services. She sits on the Editorial Board of Citywealth Magazine’s Crypto Publication and was recognised in Citywealth’s 2025 Top 30 Irish Private Client and Family Advisors.